>> help cputime CPUTIME CPU time in seconds. CPUTIME returns the CPU time in seconds that has been used by the MATLAB process since MATLAB started.
For example:
t=cputime; your_operation; cputime-t
returns the cpu time used to run your_operation.
The return value may overflow the internal representation and wrap around.
方法2： tic and toc
>> help tic TIC Start a stopwatch timer. TIC and TOC functions work together to measure elapsed time. TIC saves the current time that TOC uses later to measure the elapsed time. The sequence of commands:
TIC operations TOC
measures the amount of time MATLAB takes to complete the one or more operations specifed here by "operations"and displays the time in seconds.
